This ECG workbook provides nurses and nursing scholars the chance to perform and excellent their rhythm interpretation abilities on greater than six hundred lifelike ECG strips. Introductory textual content bargains a refresher on cardiac anatomy and body structure and ECG basics—electrophysiology, waveforms, lead placement, and steps in interpretation. next chapters offer in-depth assurance of every form of arrhythmia, pacemakers, and 12-lead ECGs, with rankings of perform strips in each one bankruptcy. A accomplished posttest gauges the power to interpret ECGs and distinguish between arrhythmia forms. The e-book comes with a laminated ruler and cost calculator that doubles as a bookmark.
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Extra info for ECG Strip Ease: An Arrhythmia Interpretation Workbook
12 second) may signify a ventricular conduction delay. A missing QRS complex may indicate AV block or ventricular standstill. Ⅵ Ⅵ ST segment The ST segment represents the end of ventricular conduction or depolarization and the beginning of ventricular recovery or repolarization. The point that marks the end of the QRS complex and the beginning of the ST segment is known as the J point. Pay special attention to the deflection of an ST segment. 5 to +1 mm in some precordial leads A change in the ST segment may indicate myocardial injury or ischemia.
It doesn’t guarantee a mechanical contraction of the heart and a subsequent pulse. The contraction could be weak, as happens with premature ventricular contractions, or absent, as happens with pulseless electrical activity. So, before you treat what the rhythm strip shows, check the patient. Pay special attention to the duration and configuration when evaluating a QRS complex. qxd 15/8/08 3:34 AM Page 23 ECG waveform components 23 QRS waveform variety These illustrations show the various configurations of QRS complexes.
To determine the ventricular rhythm, measure the intervals between two consecutive R waves in the QRS complexes. If an R wave isn’t present, use either the Q wave or the S wave of consecutive QRS complexes. The R-R intervals should occur regularly. Then compare R-R intervals in several cycles. As with atrial rhythms, consistently similar R-R intervals mean a regular ventric- Methods of measuring rhythm You can use either of the following methods to determine atrial or ventricular rhythm. Paper-and-pencil method Ⅵ Ⅵ Ⅵ Ⅵ Ⅵ Ⅵ Place the electrocardiogram (ECG) strip on a flat surface.